Microstructure evolution of AZ91D magnesium alloy during semi-solid isothermal heat treatment under direct current

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	Microstructure evolution of AZ91D magnesium alloy during semi-solid isothermal heat treatment under direct current
	Zhou, Q; Yang, YS; Tang, JL; Hu, ZQ
通讯作者	Yang, YS()
	2006
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	42 期号:1 页码:28-34
摘要	The influences of direct current density, heating temperature, and holding time on the microstructure evolution of magnesium alloy AZ91D during semi-solid isothermal heat treatment were studied, and the related mechanism was also discussed. When heating temperature and holding time are constant, with the increment of current density the primary phase becomes small and smooth. But if current density is too high, the primary grains become coarser. Direct current can accelerate the course of semi-solid isothermal heat treatment and improve globular effect of dendrites obviously. It is proposed that the activation energy is increased by direct current, so the diffusivity of solute atoms is increased, which accelerates the microstructure evolution. The effect of electromigration, Joule heat and Peltier heat caused by direct current will promote remelting and globuling of dendrites.
关键词	magnesium alloy AZ91D semi-solid alloy isothermal heat treatment direct current
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000235687800006
出版者	SCIENCE PRESS
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/87984
专题	中国科学院金属研究所
通讯作者	Yang, YS
作者单位	Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Q,Yang, YS,Tang, JL,et al. Microstructure evolution of AZ91D magnesium alloy during semi-solid isothermal heat treatment under direct current[J]. ACTA METALLURGICA SINICA,2006,42(1):28-34.
APA	Zhou, Q,Yang, YS,Tang, JL,&Hu, ZQ.(2006).Microstructure evolution of AZ91D magnesium alloy during semi-solid isothermal heat treatment under direct current.ACTA METALLURGICA SINICA,42(1),28-34.
MLA	Zhou, Q,et al."Microstructure evolution of AZ91D magnesium alloy during semi-solid isothermal heat treatment under direct current".ACTA METALLURGICA SINICA 42.1(2006):28-34.